Microscopic model for the ferroelectric field effect in oxide heterostructures

Shuai Dong,1,2 Xiaotian Zhang,3,4 Rong Yu,5 J.-M. Liu,2,6 and Elbio Dagotto3,4 1Department of Physics, Southeast University, Nanjing 211189, China 2National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China 3Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA 4Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA 5Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA 6International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China (Received 21 September 2011; published 14 October 2011)